A new movie with hilarious potential is headed our way, and it's called The Hangover. In it we get Zach Galifianakis, Ed Helms, and Bradley Cooper in Vegas after a wild bachelor party. They wind up with a tiger, a baby, and a police car, but they have no idea how they acquired any of these things. Looks like the director of Old School is giving us one of the funnier movies to come out this year. Watch the trailer after the jump.